TypeError: object of type 'int' has no len() - Python/Pygame

Question

I am creating a cookie clicker game, where there is a surface that displays how many cookies I have.

Here is my code for drawing text.

 def draw_text(self, text, font_name, size, color, x, y, align="nw"):
            font = pg.font.Font(font_name, size)
            text_surface = font.render(text, True, color)
            text_rect = text_surface.get_rect()
            self.screen.blit(text_surface, text_rect)

Then in the new function of my game loop (for when a new game starts), I created a variable:

def new(self):
        self.cookie_count = 0

And then finally, I have my drawing function.

def draw(self):
    self.draw_text('Cookies: {}'.format(len(self.cookie_count)), self.cookie_font, 105, SKYBLUE, 325, HEIGHT * 3/4, align="nw")
    pg.display.update()

Yet, when I run the program, I get:

TypeError: object of type 'int' has no len()

I am new to creating a "score counter" you could call it. But why does

self.draw_text('Cookies: {}'.format(len(self.cookie_count))

give me an error? How come the length of self.cookie_count is not printed?

I'm not quite sure what you're trying to do with `len`, but it doesn't work on `int`. `len` returns how long a string is. — TheDetective, Aug 03 '17 at 17:27

score 2 · Accepted Answer · answered Aug 03 '17 at 17:32

2

If you just want the value of self.cookie_count, you can just use

self.draw_text('Cookies: {}'.format(self.cookie_count)

The len() function returns the number of items in an object such as an array and does not work on an int object.

answered Aug 03 '17 at 17:32

Cuber

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score 1 · Answer 2 · edited Aug 03 '17 at 18:36

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You can try removing the len() function as your self.cookie_count is already an int.

So your answer should be:

self.draw_text('Cookies: {}'.format(self.cookie_count))

edited Aug 03 '17 at 18:36

robinCTS

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answered Aug 03 '17 at 17:34

Abdeen

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Congratulations on your first answer. A couple of good tips for you: 1) Use backticks (`) to quote functions, variables and other code snippets inline. 2) Use four spaces at the start of a line to create a code block. These tips and other useful information can be found by clicking on the help icon at the top right hand corner of the answer box. – robinCTS Aug 03 '17 at 18:50

score 0 · Answer 3 · edited Aug 03 '17 at 18:57

0

This is what you're looking for. len() is a container function, so len(int) gives an error. Use len(str(self.cookie_count)). Hope that helps!

EDIT: This will get you the number of digits in the integer, including a negative sign. For floats this will also count the decimal point. For small numbers (less than 10^16), it's faster to use

import math
digits = math.log10(n) + 1

but this is less readable. With large numbers, rounding imprecisions give an incorrect answer, and the simplicity of the string method far outweighs its lack of speed.

edited Aug 03 '17 at 18:57

robinCTS

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answered Aug 03 '17 at 17:30

TBlock

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You should put the relevant information from that link in your answer, as links can become deprecated over time. – xgord Aug 03 '17 at 17:31
`len` is not a "string or list function", it works for anything that implements `__len__`, and that is most built-in container types. – juanpa.arrivillaga Aug 03 '17 at 17:32
note that your `log10` algorithm only works on positive integers. – rlbond Aug 03 '17 at 18:03
Just a helpful tip for you - if you use backticks (`) around inline code snippets it makes your answer clearer. – robinCTS Aug 03 '17 at 18:59
@robinCTS Thanks! Totally forgot. – TBlock Aug 03 '17 at 20:18

score 0 · Answer 4 · edited Aug 03 '17 at 18:21

0

If you set self.cookie_count = 0 then its type is integer. len() works on lists, tuples and strings but not on integers.

edited Aug 03 '17 at 18:21

robinCTS

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answered Aug 03 '17 at 17:32

jrap3

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Using backticks (`) around inline code snippets helps to make answers clearer. – robinCTS Aug 03 '17 at 19:15

TypeError: object of type 'int' has no len() - Python/Pygame

4 Answers4